Six persons A, B, C, D, E and F lived in a building with 6 floors. Only one person lived on each floor. B lived just above D. 2 persons lived between D and F. D lived on one of the floors above F. A lived just above C who did not live on a floor second from the bottom. How many persons lived below E?
Show answer & explanation
Correct answer: A
Explanation
Correct Answer: Option 1 (None)
Floor Arrangement:
| Floor | Person |
| 6 | B |
| 5 | D |
| 4 | A |
| 3 | C |
| 2 | F |
| 1 | E |
-
Step 1: 'B lived just above D' and '2 persons lived between D and F (with D above F)' creates a fixed block of 5 floors: B → D → [empty] → [empty] → F.
-
Step 2: 'A lived just above C' means they must sit together as an AC block.
-
Step 3: Placing the 5-floor block from Floor 6 to Floor 2 leaves Floor 4 and Floor 3 empty, perfectly fitting the AC block (A on 4, C on 3). This satisfies the rule that C cannot be on the 2nd floor.
-
Step 4: The remaining floor (Floor 1) is filled by E.
Since E lives on the bottom-most floor (Floor 1), none of the persons live below E.